--> Abstract: Interpreting Formation MicroScanner Log Images of Gulf of Mexico Turbidites by Comparison with Pennsylvanian Turbidite Outcrops, Arkansas, by R. M. Slatt, D. W. Jordan, and R. J. Davis; #90987 (1993).

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SLATT, ROGER M., Colorado School of Mines, Golden, CO; DOUGLAS W. JORDAN, ARCO International Oil and Gas Co., Plano, TX; and ROBERT J. DAVIS, Schlumberger, New Orleans, LA

ABSTRACT: Interpreting Formation MicroScanner Log Images of Gulf of Mexico Turbidites by Comparison with Pennsylvanian Turbidite Outcrops, Arkansas

A comprehensive picture recently has emerged of the wide variety of slope/base of slope depositional processes and resultant facies, lateral and vertical continuity, and gamma-ray log signature of the Pennsylvanian Jackfork Group turbidites in the Ouachita Mountains of Arkansas. The details of our investigations have been reported on industry field trips anddiscussed in several recent publications. We now add another applied dimension to this picture by comparing small- and large-scale sedimentary features observed in the turbidite outcrops with what we interpret as identical features observed on Formation MicroScanner logs from Gulf of Mexico turbidites.

Small-scale features displayed on the Formation MicroScanner logs include slumps, erosional surfaces, thin sand-shale interbeds, mud-lined depressions/scours, isolated sandstone clasts in shaley debris flow beds, remnant bedding in various stages of disruption owing to flowage, and load structures. These features are similar in size and character to those observed in outcrop. On a larger scale, thin-and thick-bedded intervals and major, probably regionally correlative surfaces are recognized.

Based upon the outcrop criteria, recognition of these features on Formation MicroScanner images can lead to an improved understanding of Gulf of Mexico (and elsewhere) deep-water depositional processes, facies and their three-dimensional geometry, relative reservoir quality, and lateral and vertical continuity of beds. This understanding can prove valuable in resolving reservoir management, development drilling, and exploration issues.

AAPG Search and Discovery Article #90987©1993 AAPG Annual Convention, New Orleans, Louisiana, April 25-28, 1993.